Perforated acoustic panels are specified for industrial plant noise reduction, gymnasium acoustic walls, machine room soundproofing, and high-NRC composite ceiling systems to control reverberation and meet occupational noise exposure limits. In the field, the same panel often fails to deliver the promised NRC due to clogged perforations, incorrect cavity depth, delaminated finishes, or poorly sealed joints. This module converts the five highest-frequency site failures—poor sound absorption, blocked perforations, panel warping, facing film delamination, and joint air leaks—into a QA-grade troubleshooting map for acoustic engineering firms, plant retrofit GCs, gymnasium builders, and procurement engineers. SAMZOON, a Foshan source manufacturer, anchors the guide with free pre-bid samples, perforation pattern validation, and South China acoustic project QC.